CN107043265A - A kind of metallurgical, coloured smelting furnace is not with burning magnesite-chrome brick and preparation method thereof - Google Patents
A kind of metallurgical, coloured smelting furnace is not with burning magnesite-chrome brick and preparation method thereof Download PDFInfo
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- 239000011449 brick Substances 0.000 title claims abstract description 62
- 238000003723 Smelting Methods 0.000 title claims abstract description 44
- 238000002360 preparation method Methods 0.000 title claims description 21
- CPLXHLVBOLITMK-UHFFFAOYSA-N Magnesium oxide Chemical compound [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 claims abstract description 91
- 239000000395 magnesium oxide Substances 0.000 claims abstract description 45
- QDOXWKRWXJOMAK-UHFFFAOYSA-N dichromium trioxide Chemical compound O=[Cr]O[Cr]=O QDOXWKRWXJOMAK-UHFFFAOYSA-N 0.000 claims abstract description 26
- 239000012141 concentrate Substances 0.000 claims abstract description 20
- 229910000604 Ferrochrome Inorganic materials 0.000 claims abstract description 19
- 239000012615 aggregate Substances 0.000 claims abstract description 19
- 239000000843 powder Substances 0.000 claims abstract description 18
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 claims abstract description 13
- 239000000203 mixture Substances 0.000 claims abstract description 13
- 239000002994 raw material Substances 0.000 claims abstract description 11
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 11
- 239000007767 bonding agent Substances 0.000 claims abstract description 9
- 229910001404 rare earth metal oxide Inorganic materials 0.000 claims abstract description 9
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims abstract description 8
- 230000003647 oxidation Effects 0.000 claims abstract description 5
- 238000007254 oxidation reaction Methods 0.000 claims abstract description 5
- 235000012245 magnesium oxide Nutrition 0.000 claims description 30
- 238000001035 drying Methods 0.000 claims description 10
- 239000001095 magnesium carbonate Substances 0.000 claims description 9
- ZLNQQNXFFQJAID-UHFFFAOYSA-L magnesium carbonate Chemical compound [Mg+2].[O-]C([O-])=O ZLNQQNXFFQJAID-UHFFFAOYSA-L 0.000 claims description 9
- 235000014380 magnesium carbonate Nutrition 0.000 claims description 9
- 229910000021 magnesium carbonate Inorganic materials 0.000 claims description 9
- 238000002156 mixing Methods 0.000 claims description 9
- 238000007493 shaping process Methods 0.000 claims description 8
- 238000005245 sintering Methods 0.000 claims description 8
- MRELNEQAGSRDBK-UHFFFAOYSA-N lanthanum(3+);oxygen(2-) Chemical compound [O-2].[O-2].[O-2].[La+3].[La+3] MRELNEQAGSRDBK-UHFFFAOYSA-N 0.000 claims description 4
- 238000006664 bond formation reaction Methods 0.000 claims description 3
- 150000001875 compounds Chemical class 0.000 claims description 3
- 238000004898 kneading Methods 0.000 claims description 3
- 239000002002 slurry Substances 0.000 claims description 3
- 238000003756 stirring Methods 0.000 claims description 3
- 239000000919 ceramic Substances 0.000 claims description 2
- 229910000420 cerium oxide Inorganic materials 0.000 claims description 2
- 239000003795 chemical substances by application Substances 0.000 claims description 2
- BMMGVYCKOGBVEV-UHFFFAOYSA-N oxo(oxoceriooxy)cerium Chemical compound [Ce]=O.O=[Ce]=O BMMGVYCKOGBVEV-UHFFFAOYSA-N 0.000 claims description 2
- MMKQUGHLEMYQSG-UHFFFAOYSA-N oxygen(2-);praseodymium(3+) Chemical compound [O-2].[O-2].[O-2].[Pr+3].[Pr+3] MMKQUGHLEMYQSG-UHFFFAOYSA-N 0.000 claims description 2
- 229910003447 praseodymium oxide Inorganic materials 0.000 claims description 2
- 229910001952 rubidium oxide Inorganic materials 0.000 claims description 2
- CWBWCLMMHLCMAM-UHFFFAOYSA-M rubidium(1+);hydroxide Chemical compound [OH-].[Rb+].[Rb+] CWBWCLMMHLCMAM-UHFFFAOYSA-M 0.000 claims description 2
- 229910052761 rare earth metal Inorganic materials 0.000 claims 1
- 150000002910 rare earth metals Chemical class 0.000 claims 1
- 230000035939 shock Effects 0.000 abstract description 6
- 230000008901 benefit Effects 0.000 abstract description 5
- 230000007797 corrosion Effects 0.000 abstract description 4
- 238000005260 corrosion Methods 0.000 abstract description 4
- 229910052751 metal Inorganic materials 0.000 abstract description 4
- 239000002184 metal Substances 0.000 abstract description 4
- 238000006263 metalation reaction Methods 0.000 abstract description 3
- 239000011159 matrix material Substances 0.000 description 10
- 238000000034 method Methods 0.000 description 9
- 238000012360 testing method Methods 0.000 description 8
- 238000004458 analytical method Methods 0.000 description 6
- 230000000052 comparative effect Effects 0.000 description 6
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 6
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 5
- 230000015572 biosynthetic process Effects 0.000 description 5
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 5
- 229910052749 magnesium Inorganic materials 0.000 description 5
- 239000011777 magnesium Substances 0.000 description 5
- 239000011819 refractory material Substances 0.000 description 5
- 238000006243 chemical reaction Methods 0.000 description 4
- 239000000126 substance Substances 0.000 description 4
- 238000001514 detection method Methods 0.000 description 3
- 238000002149 energy-dispersive X-ray emission spectroscopy Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 238000001764 infiltration Methods 0.000 description 3
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N iron oxide Inorganic materials [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 239000003345 natural gas Substances 0.000 description 3
- 239000002893 slag Substances 0.000 description 3
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 2
- MKYBYDHXWVHEJW-UHFFFAOYSA-N N-[1-oxo-1-(2,4,6,7-tetrahydrotriazolo[4,5-c]pyridin-5-yl)propan-2-yl]-2-[[3-(trifluoromethoxy)phenyl]methylamino]pyrimidine-5-carboxamide Chemical compound O=C(C(C)NC(=O)C=1C=NC(=NC=1)NCC1=CC(=CC=C1)OC(F)(F)F)N1CC2=C(CC1)NN=N2 MKYBYDHXWVHEJW-UHFFFAOYSA-N 0.000 description 2
- BPQQTUXANYXVAA-UHFFFAOYSA-N Orthosilicate Chemical compound [O-][Si]([O-])([O-])[O-] BPQQTUXANYXVAA-UHFFFAOYSA-N 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000008595 infiltration Effects 0.000 description 2
- 230000035515 penetration Effects 0.000 description 2
- 238000005498 polishing Methods 0.000 description 2
- 238000001556 precipitation Methods 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 208000005156 Dehydration Diseases 0.000 description 1
- 208000037656 Respiratory Sounds Diseases 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- NACUKFIFISCLOQ-UHFFFAOYSA-N [Mg].[Cr] Chemical compound [Mg].[Cr] NACUKFIFISCLOQ-UHFFFAOYSA-N 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 239000002585 base Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- WOTWTXMUHAYOPW-UHFFFAOYSA-N chromium iron Chemical compound [Cr][Cr][Fe] WOTWTXMUHAYOPW-UHFFFAOYSA-N 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 229910052681 coesite Inorganic materials 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 229910052906 cristobalite Inorganic materials 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 230000018044 dehydration Effects 0.000 description 1
- 238000006297 dehydration reaction Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000003628 erosive effect Effects 0.000 description 1
- 235000021321 essential mineral Nutrition 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 238000010304 firing Methods 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 1
- 239000010931 gold Substances 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000011835 investigation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 238000007670 refining Methods 0.000 description 1
- 239000011214 refractory ceramic Substances 0.000 description 1
- 238000009991 scouring Methods 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 229910052682 stishovite Inorganic materials 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 229910052905 tridymite Inorganic materials 0.000 description 1
- 238000009827 uniform distribution Methods 0.000 description 1
Classifications
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/01—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics
- C04B35/03—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics based on magnesium oxide, calcium oxide or oxide mixtures derived from dolomite
- C04B35/04—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics based on magnesium oxide, calcium oxide or oxide mixtures derived from dolomite based on magnesium oxide
- C04B35/043—Refractories from grain sized mixtures
- C04B35/047—Refractories from grain sized mixtures containing chromium oxide or chrome ore
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- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/622—Forming processes; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
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- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/622—Forming processes; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/626—Preparing or treating the powders individually or as batches ; preparing or treating macroscopic reinforcing agents for ceramic products, e.g. fibres; mechanical aspects section B
- C04B35/63—Preparing or treating the powders individually or as batches ; preparing or treating macroscopic reinforcing agents for ceramic products, e.g. fibres; mechanical aspects section B using additives specially adapted for forming the products, e.g.. binder binders
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- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/622—Forming processes; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/64—Burning or sintering processes
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- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
- C04B2235/30—Constituents and secondary phases not being of a fibrous nature
- C04B2235/32—Metal oxides, mixed metal oxides, or oxide-forming salts thereof, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
- C04B2235/3217—Aluminum oxide or oxide forming salts thereof, e.g. bauxite, alpha-alumina
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- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
- C04B2235/30—Constituents and secondary phases not being of a fibrous nature
- C04B2235/32—Metal oxides, mixed metal oxides, or oxide-forming salts thereof, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
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- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
- C04B2235/30—Constituents and secondary phases not being of a fibrous nature
- C04B2235/32—Metal oxides, mixed metal oxides, or oxide-forming salts thereof, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
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- C04B2235/32—Metal oxides, mixed metal oxides, or oxide-forming salts thereof, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
- C04B2235/3224—Rare earth oxide or oxide forming salts thereof, e.g. scandium oxide
- C04B2235/3227—Lanthanum oxide or oxide-forming salts thereof
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- C04B2235/32—Metal oxides, mixed metal oxides, or oxide-forming salts thereof, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
- C04B2235/3224—Rare earth oxide or oxide forming salts thereof, e.g. scandium oxide
- C04B2235/3229—Cerium oxides or oxide-forming salts thereof
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- C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
- C04B2235/30—Constituents and secondary phases not being of a fibrous nature
- C04B2235/32—Metal oxides, mixed metal oxides, or oxide-forming salts thereof, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
- C04B2235/327—Iron group oxides, their mixed metal oxides, or oxide-forming salts thereof
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- C04B2235/65—Aspects relating to heat treatments of ceramic bodies such as green ceramics or pre-sintered ceramics, e.g. burning, sintering or melting processes
- C04B2235/66—Specific sintering techniques, e.g. centrifugal sintering
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- C04B2235/9607—Thermal properties, e.g. thermal expansion coefficient
Abstract
The invention belongs to metallurgical, coloured smelting furnace high grade refractory and its preparing technical field, and in particular to a kind of metallurgical, coloured smelting furnace is not with burning magnesite-chrome brick.A kind of metallurgical, coloured smelting furnace is as follows with magnesite-chrome brick, including aggregate, powder and bonding agent, the raw materials by weight portion composition of the aggregate is not burnt：High-purity magnesia（MgO >=97.5%, the mesh of granularity 7 90）35 45 parts, fused magnesia-chrome（MgO >=69%, Cr2O3>=20%, the mesh of granularity 7 90）15 25 parts；The raw materials by weight portion composition of the powder is as follows：Ferrochrome concentrate（Cr2O3Content is 47% 60%, Fe2O3Content is 15% 27%, and content of MgO is 9.0% 13%, the mesh of granularity 300 350）30 35 parts, cold agglutinant（Granularity nanoscale）24 parts, rare earth oxide（The mesh of granularity 2,000 3500）0.3 0.6 parts, Reactive alumina（The mesh of granularity 2,000 3500）24 parts；25 parts of bonding agent, 13 parts of water.The present invention have the advantages that purity is high, density is big, intensity is high, high temperature good thermal shock stability, corrosion resistance are strong and resist melt metal and oxidation resistance is burnt till by force, without high temperature, cost is low, energy-saving and emission-reduction, prepare it is safe.
Description
Technical field
The invention belongs to metallurgical, coloured smelting furnace high grade refractory and its preparing technical field, and in particular to a kind of
Metallurgical, coloured smelting furnace is not with burning magnesite-chrome brick.
Background technology
Magnesite-chrome brick is with magnesia (MgO) and chrome green (Cr2O3) for main component, and periclase and chromohercynite are
The fire resistive material product of essential mineral component.This kind of brick refractoriness is high, and elevated temperature strength is big, and alkali resistance scouring is strong, thermally-stabilised
Property is excellent, also there is certain adaptability to acid slag.Magnesian-chrome efractoy is still global Steel Refining and coloured smelting so far
The irreplaceable key basic material of gold.
With the development of science and technology the industrial requirement more and more higher for refractory material, existing magnesite-chrome brick refractory material
Performance can not increasingly meet the industrial performance requirement for refractory material, there is that furnace life is short, and economic attrition is big etc. asks
Topic.At present, the magnesite-chrome brick of commercial type generally uses traditional high temperature sintering preparation technology, in national requirements using cleaning energy
Under the requirement in source, heat energy generally is provided using natural gas, cost is high and there is the potential safety hazards such as gas explosion, for example：Letter
The magnesite-chrome brick of moral member Henan refractory factory production（Model Mge-8A, Mge-12A）The magnesium chromium produced with Zhengzhou Dongyang fire resisting factory
Brick（Model DYMGe-16, DYMGe-18）Compressive resistance and thermal shock resistance performance it is relatively low.Therefore, one kind is developed without high temperature
Burn till, cost is low, performance is good coloured smelting furnace with magnesite-chrome brick is not burnt is very necessary.
The content of the invention
The problem of existing for prior art, it is an object of the invention to provide a kind of coloured smelting furnace with not burning magnesite-chrome brick
And preparation method thereof.With not burning, magnesite-chrome brick has purity height to the coloured smelting furnace of the present invention, density is big, intensity is high, high temperature thermal shock is steady
Qualitative good, corrosion resistance is strong and the advantages of resist melt metal and strong oxidation resistance；Preparation method of the present invention is simple, without high temperature
Burn till, cost is low, energy-saving and emission-reduction, prepare safety.
In order to solve the above technical problems, the technical solution adopted by the present invention is.
A kind of coloured smelting furnace is not with magnesite-chrome brick, including aggregate, powder and bonding agent is burnt, and the raw material of the aggregate is by weight
Number composition is as follows：High-purity magnesia（MgO >=97.5%, granularity 7-90 mesh）35-45 parts, fused magnesia-chrome（MgO >=69%,
Cr2O3>=20%, granularity 7-90 mesh）15-25 parts；The raw materials by weight portion composition of the powder is as follows：Ferrochrome concentrate（Cr2O3
Content is 47%-60%, Fe2O3Content is 15%-27%, and content of MgO is 9.0%-13%, granularity 300-350 mesh）30-35 parts, cold burning
Bonding agent（Granularity nanoscale）2-4 parts, rare earth oxide（Granularity 2000-3500 mesh）0.3-0.6 parts, Reactive alumina
（1-2 microns of granularity）2-4 parts；1-3 parts of water.
A preferred embodiment of the present invention, including aggregate, powder and bonding agent, the raw materials by weight portion group of the aggregate
Into as follows：High-purity magnesia（Content of MgO is 97.5%-98.5%, granularity 7-90 mesh）40 parts, fused magnesia-chrome（Content of MgO is
69%-72%, Cr2O3Content is 20%-21%, granularity 7-90 mesh）20 parts；The raw materials by weight portion composition of the powder is as follows：Chromium
Iron ore concentrate（Cr2O3Content is 47%-60%, Fe2O3Content is 15%-27%, and content of MgO is 9.0%-13%, granularity 300-350 mesh）
32 parts, cold agglutinant（Granularity nanoscale）3-4 parts, rare earth oxide（Granularity 2000-3500 mesh）0.5 part, activated alumina it is micro-
Powder（Granularity 2000-3500 mesh）3 parts；5 parts of bonding agent, 3 parts of water.
Another preferred scheme of the present invention, the high-purity magnesite clinker of the high-purity magnesia including 30%-40% and
60%-70% high-purity electrosmelted magnesite clinker.
The third preferred scheme of the present invention, the high-purity magnesia includes 37.5% high-purity magnesite clinker and 62.5%
High-purity electrosmelted magnesite clinker.
The 4th kind of preferred scheme of the present invention, the ferrochrome concentrate includes 30%-40% ferrochrome concentrate A（Cr2O3Content is
54%-60%, Fe2O3Content is 15%-20%, and content of MgO is 10%-13%, granularity 300-350 mesh）With 60%-70% ferrochrome concentrate B
（Cr2O3Content is 47%-50%, Fe2O3Content is 26%-27%, and content of MgO is 9.0%-9.9%, granularity 300-350 mesh）.
The 5th kind of preferred scheme of the present invention, the ferrochrome concentrate includes 37.5% ferrochrome concentrate A（Cr2O3Content is 54%-
56%, Fe2O3Content is 15%-20%, and content of MgO is 10%-13%, granularity 300-350 mesh）With 62.5% ferrochrome concentrate B
（Cr2O3Content is 45%-47%, Fe2O3Content is 26%-27%, and content of MgO is 9.0%-9.9%, granularity 300-350 mesh）.
Further, the rare earth oxide is one kind in yittrium oxide, cerium oxide, lanthana, rubidium oxide and praseodymium oxide
Or two kinds.
Further, the bonding agent is vitrified bond.
Further, the cold agglutinant is ceramic post sintering agent.
A kind of coloured smelting furnace preparation method for not burning magnesite-chrome brick, step is as follows：
（1）High-purity magnesia and fused magnesia-chrome are weighed by weight, is put into disintegrating machine and is crushed, and are added after crushing
Crushed in ball mill, sift out the aggregate that granularity is granularity 7-90 mesh after crushing with vibratory sieve again；
（2）Ferrochrome concentrate, cold agglutinant, rare earth oxide and Reactive alumina are weighed by weight, are put into container
It is mixedly configured into powder；
（3）Batch mixing：The aggregate of preparation is put into pug kneading machine, vitrified bond is added, when rotating speed 40-60r/min is stirred
Between 10-20 minutes, stirring when add water to vitrified bond formation slurry be wrapped in aggregate surface, add above-mentioned steps（2）
The powder of preparation continues to mix, mixing time 20-30 minutes；
（4）Shaping：Weigh a certain amount of batch mixing and be put into shaping in press, press pressure is 1000 tons；
（5）Dry：The compound adobe of shaping is put into electrical drying device to be dried, 160 DEG C -200 DEG C of drying temperature, done
It is dry 12-16 hours, get product.
Beneficial effects of the present invention：The present invention is metallurgical, coloured smelting furnace is far above current city with the performance for not burning magnesite-chrome brick
Magnesite-chrome brick on face, SEM the and EDAX analysis reports provided from Luoyang Institute of Refractories Research, magnesite-chrome brick of the present invention is used
The observation analysis under Electronic Speculum of residual brick afterwards, without obvious conversion zone, is mainly shown as the infiltration of slag, penetration depth about 10mm.Only
It is to have one about 0.2 ~ 0.3 mm Fe layers of bands of richness at working face, product may be magnesium Fu Shi bodies（RO phases）, then contrast table 5 and table 6,
It follows that the present invention have preferable bond strength, preferable refractoriness under load, thermal shock resistance, erosion resisting, and
In use have while with while sinter the characteristics of, its normal temperature and elevated temperature strength are up to more than 80MPa（Comparative example 1-4 institutes
Show）, extend furnace life；And the cold firing techniques of CSP are applied on refractory material magnesite-chrome brick by the present invention, with high temperature sintering phase
Than cold to burn till this 50-100 yuan/ton, natural gas brick is burnt till in 600-1000 yuan/ton or so of cost, preparation process of the invention not
It is that society saves financial cost but cost is reduced, creates huge economic benefit, and in the absence of appointing that natural gas can trigger
What security hidden trouble.
Brief description of the drawings
Fig. 1 is that metallurgical, coloured smelting furnace prepared by embodiment 2 with magnesite-chrome brick is not burnt using the scale of preceding polishing is 10 μm
Scanning electron microscope (SEM) photograph.
Fig. 2 is that metallurgical, coloured smelting furnace prepared by embodiment 2 with magnesite-chrome brick is not burnt using the scale of preceding polishing is 100 μm
Scanning electron microscope (SEM) photograph.
Fig. 3 is that metallurgical, coloured smelting furnace prepared by embodiment 2 is with not burning magnesite-chrome brick using the scale at rear working face
1mm scanning electron microscope (SEM) photograph.
Fig. 4 is that metallurgical, coloured smelting furnace prepared by embodiment 2 is with not burning magnesite-chrome brick using the scale at rear working face
200 μm of scanning electron microscope (SEM) photograph.
Fig. 5 is metallurgical, the coloured smelting furnace mark for not burning matrix at nearly working face after magnesite-chrome brick use prepared by embodiment 2
Chi is 100 μm of scanning electron microscope (SEM) photograph.
Fig. 6 is metallurgical, the coloured smelting furnace mark for not burning matrix at nearly working face after magnesite-chrome brick use prepared by embodiment 2
Chi is 500 μm of scanning electron microscope (SEM) photograph.
Fig. 7 is that metallurgical, coloured smelting furnace prepared by embodiment 2 uses rear permeable formation end with magnesite-chrome brick is not burnt（9~
10mm）Scale is 100 μm of scanning electron microscope (SEM) photographs.
Fig. 8 is that metallurgical, coloured smelting furnace prepared by embodiment 2 uses rear permeable formation end with magnesite-chrome brick is not burnt（9~
10mm）Scale is 500 μm of scanning electron microscope (SEM) photographs.
Fig. 9 be embodiment 2 prepare metallurgical, coloured smelting furnace with do not burn after magnesite-chrome brick use away from working face about 4mm mark
Chi is 1mm scanning electron microscope (SEM) photograph.
Figure 10 be metallurgical, the coloured smelting furnace for preparing of embodiment 2 with do not burn magnesite-chrome brick using preceding scale be 1mm scanning it is electric
Mirror figure.
Figure 11 is that metallurgical, coloured smelting furnace prepared by embodiment 2 uses the scanning that preceding scale is 200 μm with magnesite-chrome brick is not burnt
Electron microscope.
Figure 12 is that metallurgical, coloured smelting furnace prepared by embodiment 2 uses the scanning that preceding scale is 50 μm with magnesite-chrome brick is not burnt
Electron microscope.
Figure 13 is that metallurgical, coloured smelting furnace prepared by embodiment 2 uses the scanning that preceding scale is 50 μm with magnesite-chrome brick is not burnt
Electron microscope.
Embodiment
For a further understanding of the present invention, the preferred embodiment of the invention is described with reference to embodiment, still
It should be appreciated that these descriptions are simply to further illustrate the features and advantages of the present invention, rather than to the claims in the present invention
Limitation.
Embodiment 1.
Raw material is weighed by each component specified in table 1 below respectively, preparation method is as follows.
A kind of metallurgical, coloured smelting furnace preparation method for not burning magnesite-chrome brick, step is as follows：
（1）High-purity magnesia and fused magnesia-chrome are weighed by weight, is put into disintegrating machine and is crushed, and are added after crushing
Crushed in ball mill, sift out the aggregate that granularity is granularity 7-90 mesh after crushing with vibratory sieve again；
（2）Ferrochrome concentrate, cold agglutinant, rare earth oxide and Reactive alumina are weighed by weight, are put into container
It is mixedly configured into powder.
（3）Batch mixing：The aggregate of preparation is put into pug kneading machine, vitrified bond is added, rotating speed 40-60r/min is stirred
Time 10-20 minute is mixed, vitrified bond formation slurry is added water in stirring and is wrapped in aggregate surface, above-mentioned steps are added
（2）The powder of preparation continues to mix, mixing time 20-30 minutes.
（4）Shaping：Weigh a certain amount of batch mixing and be put into press and be molded, press pressure is 1000 tons, first tip-tap 3 times, after
Beat again 7 times.Half-formed bulk density is not less than 3.30g/cm3.
（5）Dry：The compound adobe of shaping is put into micro-wave drying kiln to be dried, 160 DEG C -200 of drying temperature
DEG C, dry 12-16 hours, get product.
The finished product for preparing of the embodiment of the present invention 1 carries out physical and mechanical property indexs inspection to it.Test is listed in table 5
As a result.
Embodiment 2.
The method that embodiment 1 is repeated by each component content specified in table 1 below, test result is listed in table 5.
Embodiment 3.
The method that embodiment 1 is repeated by each component content specified in table 1 below, test result is listed in table 5.
Embodiment 4.
The method that embodiment 1 is repeated by each component content specified in table 1 below, test result is listed in table 5.
Comparative example 1.
The method that embodiment 1 is repeated by each component content specified in table 1 below, it is unique the difference is that in preparation method step
Drying temperature in rapid 5 rises to 1750 DEG C, and compressive resistance test result is listed in table 5.
Comparative example 2.
The method that embodiment 2 is repeated by each component content specified in table 1 below, it is unique the difference is that in preparation method step
Drying temperature in rapid 5 rises to 1750 DEG C, and compressive resistance test result is listed in table 5.
Comparative example 3.
The method that embodiment 3 is repeated by each component content specified in table 1 below, it is unique the difference is that in preparation method step
Drying temperature in rapid 5 rises to 1750 DEG C, and compressive resistance test result is listed in table 5.
Comparative example 4.
The method that embodiment 1 is repeated by each component content specified in table 1 below, it is unique the difference is that in preparation method step
Drying temperature in rapid 5 rises to 1750 DEG C, and compressive resistance test result is listed in table 5.
First, performance detection.
1. a pair embodiments of the invention randomly select embodiment 2 and carry out SEM and EDAX analyses.Client：Luoyang fire resisting
Investigation of materials institute, analyst：Huang Zhenwu, SEM the and EDAX analysis report contents that Luoyang Institute of Refractories Research provides are as follows：
Residual brick：The observation analysis under Electronic Speculum, the sample is mainly shown as the infiltration of slag, penetration depth is about without obvious conversion zone
10mm.Simply there are one about 0.2 ~ 0.3 mm Fe layers of bands of richness at working face, product may be magnesium Fu Shi bodies（RO phases）.
Fig. 3 is the low power microstructure at working face, and the brilliant white band on surface is Fe layers of band of richness, and lower section is permeable formation.
Fig. 4 is the high power microstructure at working face, and top is Fe layers of band of richness, and lower section then characterizes periclase and FeO course of reaction,
Periclase is gradually reacted away by FeO, forms magnesium Fu Shi bodies（RO phases）, its chemical composition such as table 2.Permeable formation：It is mainly shown as
SiO2Infiltration, and with MgO reaction generation M2S is filled in the stomata of matrix, makes the compact structure of matrix.In addition, close to work
The heavy crystalline substance for making face prescription magnesite crystal grows up phenomenon also clearly.Fig. 5 and Fig. 6 is the microstructure of matrix at nearly working face,
Principal crystalline phase periclase weight crystalline substance is grown up, and transgranular to be enclosed with substantial amounts of granular spinelle precipitation phase, intergranular then fills substantial amounts of M2S（Change
Study a point such as table 3）, it is rendered as densified structure.
Fig. 7 and Fig. 8 is permeable formation end（9~10mm）Microstructure, it is similar with the matrix structure of nearly working face, still
There is substantial amounts of M2S to generate, but periclase weight crystalline substance phenomenon of growing up is significantly slight.In addition, have at away from working face about 4mm one parallel to
The crack of working face, penetrates into more FeO, and generate a large amount of magnesium Fu Shi bodies（RO phases）, see Fig. 9.Former brick：Fig. 1, Fig. 2 and figure
10 be the microstructure of former brick, characterizes particle and the uniform distribution of matrix.
Base portion is porous network-like structure, based on strip insertion stomata, but periclase itself or thin with chrome ore
Powder, which is together with each other, forms continuous skeleton structure（As shown in figure 11）.In matrix, periclase and periclase or square magnesium
It is generally silicate phase between stone and chrome ore（CMS or M2S）It is cementing（As shown in figure 12）.Small part region be generally directly in conjunction with,
Silicate phase is few（As shown in figure 13）.In matrix, periclase is transgranular to be still enclosed with substantial amounts of granular spinelle precipitation phase.To matrix
A point zone face constituent analysis is carried out, its result is as shown in table 4（Remarks：0mm is Fe layers of region with lower section of richness at working face）.
In summary：The present invention has the advantages that strong corrosion resistance, resist melt metal and oxidation resistance are strong.
2. metallurgical, coloured smelting furnace prepared by couple embodiment 1-4 carries out performance detection with magnesite-chrome brick is not burnt, as a result such as table
5。
3. choosing the magnesite-chrome brick prepared on the market carries out performance detection, as a result such as table 6.
From table 5 and table 6, coloured smelting furnace prepared by the present invention bulk density ＞ 3.22g/ for not burning magnesite-chrome brick
Cm3, the magnesite-chrome brick bulk density of Zhengzhou Dongyang fire resisting factory is 3.05g/cm3 and 3.10 g/cm3, letter moral member Henan refractory material
The magnesite-chrome brick bulk density of factory is 3.01g/cm3 and 3.08 g/cm3, it can be seen that, bulk density of the invention is more than on the market
The bulk density of the magnesite-chrome brick of preparation, illustrates that corrosion resistance of the present invention is strong and resist melt metal and oxidation resistance are strong.
The cold crushing strength of the present invention is 90 more than Mpa, and high temperature break resistant intensity is more than 13Mpa, Zhengzhou Dongyang fire resisting factory
Magnesite-chrome brick compressive resistance be 45, the magnesite-chrome brick compressive resistance of letter moral member Henan refractory factory is 25, it can be seen that, the present invention
With higher compressive resistance.
Crackle, Zhengzhou Dongyang fire resisting factory occur more than 10 times for the thermal shock resistance of present invention cold water number of times at 1100 DEG C
Magnesite-chrome brick water cooling number of times be 7 times, the magnesite-chrome brick water cooling number of times of letter moral member Henan refractory factory is 8 times, it can be seen that, this hair
The performance of bright resistance high temperature stress is high, high temperature good thermal shock stability.
As shown in Table 5, metallurgical, the coloured smelting furnace that 200 DEG C of baking dehydrations of the invention are prepared, which is used, does not burn the normal of magnesite-chrome brick
Warm compressive resistance is more than 90Mpa, and this is due to that aquation combination makes the present invention have higher cold crushing strength；This hair
The bright sintering at 1750 DEG C is that the effect of refractory ceramics sintering makes metallurgical, the coloured smelting furnace resistance to pressure of normal temperature for not burning magnesite-chrome brick
Spend for more than 80Mpa, therefore, the present invention have in use while using while sinter the characteristics of.Its normal temperature and elevated temperature strength
Up to more than 80MPa（Shown in comparative example 1-4）.
It is understood that above with respect to the specific descriptions of the present invention, being merely to illustrate the present invention and being not limited to this
Technical scheme described by inventive embodiments, it will be understood by those within the art that, still can be to present invention progress
Modification or equivalent substitution, to reach identical technique effect；As long as meet use needs, all protection scope of the present invention it
It is interior.
Claims (10)
1. a kind of metallurgical, coloured smelting furnace is not with burning magnesite-chrome brick, it is characterised in that：Including aggregate, powder and bonding agent,
The raw materials by weight portion composition of the aggregate is as follows：
High-purity magnesia（MgO >=97.5%, granularity 7-90 mesh）35-45 parts
Fused magnesia-chrome（MgO >=69%, Cr2O3>=20%, granularity 7-90 mesh）15-25 parts；
The raw materials by weight portion composition of the powder is as follows：
Ferrochrome concentrate（Cr2O3Content is 47%-60%, Fe2O3Content is 15%-27%, and content of MgO is 9.0%-13%, granularity 300-
350 mesh）30-35 parts
Cold sintering mixture（Granularity nanoscale）2-4 parts
Rare earth oxide（Granularity 2000-3500 mesh）0.3-0.6 parts
Reactive alumina（1-2 microns of granularity）2-4 parts；
1-3 parts of water.
2. coloured smelting furnace according to claim 1 is not with burning magnesite-chrome brick, it is characterised in that：Including aggregate, powder and knot
Mixture,
The raw materials by weight portion composition of the aggregate is as follows：
High-purity magnesia（Content of MgO is 97.5%-98.5%, granularity 7-90 mesh）40 parts
Fused magnesia-chrome（Content of MgO is 69%-72%, Cr2O3Content is 20%-21%, granularity 7-90 mesh）20 parts；
The raw materials by weight portion composition of the powder is as follows：
Ferrochrome concentrate（Cr2O3Content is 47%-60%, Fe2O3Content is 15%-27%, and content of MgO is 9.0%-13%, granularity 300-
350 mesh）32 parts
Cold sintering mixture（Granularity nanoscale）3 parts
Rare earth oxide（Granularity 2000-3500 mesh）0.5 part
Reactive alumina（Granularity 2000-3500 mesh）3 parts；
3 parts of water.
3. coloured smelting furnace according to claim 1 is not with burning magnesite-chrome brick, it is characterised in that：The high-purity magnesia includes
30%-40% high-purity magnesite clinker and 60%-70% high-purity electrosmelted magnesite clinker.
4. coloured smelting furnace according to claim 1 is not with burning magnesite-chrome brick, it is characterised in that：The high-purity magnesia includes
37.5% high-purity magnesite clinker and 62.5% high-purity electrosmelted magnesite clinker.
5. coloured smelting furnace according to claim 1 is not with burning magnesite-chrome brick, it is characterised in that：The ferrochrome concentrate includes
30%-40% ferrochrome concentrate A（Cr2O3Content is 54%-60%, Fe2O3Content is 15%-20%, and content of MgO is 10%-13%, granularity
300-350 mesh）With 60%-70% ferrochrome concentrate B（Cr2O3Content is 47%-50%, Fe2O3Content is 26%-27%, content of MgO
For 9.0%-9.9%, granularity 300-350 mesh）.
6. coloured smelting furnace according to claim 1 is not with burning magnesite-chrome brick, it is characterised in that：The ferrochrome concentrate includes
37.5% ferrochrome concentrate A（Cr2O3Content is 54%-56%, Fe2O3Content is 15%-20%, and content of MgO is 10%-13%, granularity 300-
350 mesh）With 62.5% ferrochrome concentrate B（Cr2O3Content is 45%-47%, Fe2O3Content is 26%-27%, and content of MgO is 9.0%-
9.9%, granularity 300-350 mesh）.
7. metallurgical, coloured smelting furnace according to claim 1 is not with burning magnesite-chrome brick, it is characterised in that：The rare-earth oxidation
Thing is one or both of yittrium oxide, cerium oxide, lanthana, rubidium oxide and praseodymium oxide.
8. metallurgical, coloured smelting furnace according to claim 1 is not with burning magnesite-chrome brick, it is characterised in that：The bonding agent is
Vitrified bond.
9. metallurgical, coloured smelting furnace according to claim 1 is not with burning magnesite-chrome brick, it is characterised in that：The cold agglutinant
For ceramic post sintering agent.
10. a kind of metallurgical, coloured smelting furnace preparation method for not burning magnesite-chrome brick, according to any described smeltings of claim 1-9
Golden, coloured smelting furnace is not with burning magnesite-chrome brick, it is characterised in that step is as follows：
（1）High-purity magnesia and fused magnesia-chrome are weighed by weight, is put into disintegrating machine and is crushed, and are added after crushing
Crushed in ball mill, sift out the aggregate that granularity is granularity 7-90 mesh after crushing with vibratory sieve again；
（2）Ferrochrome concentrate, cold agglutinant, rare earth oxide and Reactive alumina are weighed by weight, are put into container
It is mixedly configured into powder；
（3）Batch mixing：The aggregate of preparation is put into pug kneading machine, vitrified bond is added, when rotating speed 40-60r/min is stirred
Between 10-20 minutes, stirring when add water to vitrified bond formation slurry be wrapped in aggregate surface, add above-mentioned steps（2）
The powder of preparation continues to mix, mixing time 20-30 minutes；
（4）Shaping：Weigh a certain amount of batch mixing and be put into shaping in press, press pressure is 1000 tons；
（5）Dry：The compound adobe of shaping is put into electrical drying device to be dried, 160 DEG C -200 DEG C of drying temperature, done
It is dry 12-16 hours, get product.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110655411A (en) * | 2019-10-25 | 2020-01-07 | 海城利尔麦格西塔材料有限公司 | Magnesium-chromium unburned brick for AOD furnace and preparation method thereof |
| CN111848133A (en) * | 2020-06-09 | 2020-10-30 | 西昌学院 | Preparation method of high-thermal-shock-resistance magnesium oxide ceramic |
| CN114315383A (en) * | 2021-12-24 | 2022-04-12 | 海城利尔麦格西塔材料有限公司 | Heat treatment method of regenerated magnesia carbon brick particles |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102336539A (en) * | 2011-09-02 | 2012-02-01 | 浙江铭德新材科技有限公司 | Waste utilization regeneration baking-free magnesia chrome brick and preparation method thereof |
| CN102786314A (en) * | 2012-08-23 | 2012-11-21 | 武汉钢铁(集团)公司 | Fused-rebonded magnesite-chrome brick with excellent thermal shock resistance and production process |
-
2017
- 2017-03-27 CN CN201710186312.XA patent/CN107043265B/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102336539A (en) * | 2011-09-02 | 2012-02-01 | 浙江铭德新材科技有限公司 | Waste utilization regeneration baking-free magnesia chrome brick and preparation method thereof |
| CN102786314A (en) * | 2012-08-23 | 2012-11-21 | 武汉钢铁(集团)公司 | Fused-rebonded magnesite-chrome brick with excellent thermal shock resistance and production process |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110655411A (en) * | 2019-10-25 | 2020-01-07 | 海城利尔麦格西塔材料有限公司 | Magnesium-chromium unburned brick for AOD furnace and preparation method thereof |
| CN111848133A (en) * | 2020-06-09 | 2020-10-30 | 西昌学院 | Preparation method of high-thermal-shock-resistance magnesium oxide ceramic |
| CN114315383A (en) * | 2021-12-24 | 2022-04-12 | 海城利尔麦格西塔材料有限公司 | Heat treatment method of regenerated magnesia carbon brick particles |
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